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Following are the properties of four minerals P, Q, R and S. Identify them and select the correct option.
P : It is required for proper functioning of thyroid gland.
Q : It helps in maintaining body’s water balance.
R : It is important for haemoglobin formation.
S : It strengthens bones and teeth and helps in blood clotting.

A Deficiency of P causes dryness of eyes and inflammation of tongue.
BQ is also required for the proper functioning of nervous system.
C Deficiency of R causes goitre.
DS also helps to fight infections and keeps skin and mouth healthy.